Patent US2964065A successfully refreshed from Google Patents.
US2964065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytetrafluoroethylene tubing and method of making the same
Assignee: Continental-Diamond Fibre Corp
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Filing: 1958-04-30
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Granted: 1960-12-13
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Expires: 1978-04-30
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Haroldson
- 👤 John S Taylor
- 👤 Jr William F Cann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:37
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; Y; Y10; Y10S; Y10S138/00; Y10S138/03; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
AS AN ARTICLE OF MANUFACTURE, A TUBE ADAPTED TO BE CRIMPED BY FLATTENING ITS SIDES WITHOUT SPLITTING OR CRACKING, COMPRISING A PLURALITY OF LAYERS OF EXTRUDING CALENDERED POLYTETRAFLUOROETHYLENE TAPE WOUND CIRCUMFERENTIALLY IN THE MACHINE DIRECTION AS FORMED BY THE CALENDER ROLLS WITH THE LAYERS SINTERED TOGETHER IN THE WOUND TUBE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |